Key Features

Playground API offers a comprehensive, zero-setup mock backend for web & mobile development:

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  Complete CRUD Operations — Create, read, update, and delete resources with persistent sandbox overlay state.
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  Standard REST API — Standard RESTful endpoints for all resources (/posts, /comments, /users, /todos).
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  GraphQL Gateway Support — Modern GraphQL schema and interactive GraphiQL IDE at /api/v1/graphql.
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  Built-in Pagination & Sorting — Built-in ?_page=1&_limit=10 and ?_sort=title&_order=desc parameters for infinite scroll.
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  Fake JWT Authentication — Secure token simulation with access and refresh tokens via /auth/login and /auth/me.
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  Network & Chaos Simulation — Test UI loading skeletons (?_delay=1500) and error boundaries (?_status=500).
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  Dynamic Custom Collections — Create arbitrary schema-less collections on the fly (/custom/products, /custom/orders).
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  Universal Full-Text Search — Search keywords across titles and body contents using ?q=keyword.
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  Deterministic SVG Avatars — Vector user avatars and thumbnail placeholders dynamically generated via /avatars/:seed.
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  Snapshot Export & Import — Download sandbox state as a JSON file or restore snapshots for automated E2E tests.
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  Ready-to-Use Client Collections — OpenAPI 3.0, Postman, Bruno, Insomnia, and TypeScript .d.ts downloads included.